Study on Optimization Extraction of Zanthoxylum bungeanum Oil Based on Orthogonal Experimental Method

Zanthoxylum bungeanum was taken as the experimental material,the oil extraction process was studied by using single factor and orthogonal experiment design,and the influences of some factors such as particle size of Zanthoxylum bungeanum,extraction pressure,extraction temperature and extraction time on the extraction ratio of Zanthoxylum bungeanum oil were examined by the method of supercritical carbon dioxide fluid.The best technical parameters were obtained as follows: 60 mesh particle size of Zanthoxylum bungeanum,extraction pressure 30 MPa,extraction time 2.0 h,extraction temperature 40 ℃ and flux of carbon dioxide 40 L/h.Under these conditions,the extraction yield of Zanthoxylum bungeanum oil could reach above 7.68%.